package book;

public class BookList {
    private Book[] books = new Book[10];
    private int usedSize;

    public BookList() {
        books[0] = new Book("三国演义", "罗贯中", 10, "小说");
        books[1] = new Book("西游记", "吴承恩", 15, "小说");
        books[2] = new Book("红楼梦", "曹雪芹", 5, "小说");
        usedSize = 3;
    }

    /**
     * 获取某个下标的书
     * @param pos
     * @return
     */
    public Book getBook(int pos) {
        if (pos < 0) {
            return null;
        }
        return books[pos];
    }

    public void setBook(int pos, Book book) {
        books[pos] = book;
    }

    public int getUsedSize() {
        return usedSize;
    }

    public void setUsedSize(int usedSize) {
        this.usedSize = usedSize;
    }
}
